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Updated over 3 years ago on . Most recent reply
![Chuck Payette's profile image](https://bpimg.biggerpockets.com/no_overlay/uploads/social_user/user_avatar/2006688/1696524666-avatar-chuckp37.jpg?twic=v1/output=image/cover=128x128&v=2)
Spray foam as sound barrier ?
Gathering bids on new construction over/under duplex. One builder says spray foam between levels for sound barrier. Will that just transfer thunking of footsteps through joists and ceiling of lower level more?
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![Jody Sperling's profile image](https://bpimg.biggerpockets.com/no_overlay/uploads/social_user/user_avatar/1761438/1621515323-avatar-jodys18.jpg?twic=v1/output=image/crop=960x960@0x0/cover=128x128&v=2)
Spray foam insulation would be a great sound barrier. The higher the R-value, the greater the noise deadening. The two go hand-in-hand.